Combination air cleaner and silencer



Sept. 28, 1954 1. .1. DREzNEs COMBINATION AIR CLEANER AND SILENCER Filed Sept. l5, 1950 www wm. ww KAQ X Anw iR.

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Patented Sept. 28, 1954 UNITED STATES PATENT yottici;

COMBINATION AIR CLEANER AND SILENCER John J. Dreznes, Chicago, Ill., assignor'to'United Specialties Company, Chicago, Ill.,acorpora tion of Delaware Application September 15, 1950, SerialNo. 185,076

Y 3 Claims.

This invention relates `to "an air cleaner or 'dust separator andhas for one objectto provide vmeans for removing dust or otherioreign matter from a moving stream of air and gas. In particular, however, the invention relates to an air cleaner embodying a rsilencer which is formed as a part of, or associated with, the air cleaner so that the two become a unit.

It has for an object, therefore, the provision of an air `cleaning and silencing vmeans in which 'the parts are assembled' within the smallest possi- The invention is illustrated more or less dia? grammatically in the accompanying drawing, wherein theigureis a` partial vertical cross. section with parts broken away showing one form of the device.

Like'parts are indicated by like charactersin the specification and drawings.

As shown, the housing and passage defining members are generally built up from a number of pieces, but they might be formed integrally or unitarily, and the structure shown embodies useful and economical details of construction suitable for present manufacturing practices and the invention is not limited to the specic minor details of construction shown.

In the gure a housing member 53 forms one Wall of an annular air inlet 541. This housing member 53 is provided at its upper edge with an outwardly extending flange 55 and is shaped inwardly to provide a shoulder 56 and an inclined, inwardly and downwardly directed portion 51. Inwardly of the portion 51 is a generah ly vertically disposed portion 58. 55 forms generally the bottom of a sump portion. The portion 59 is continued upwardly in a cylindrical member B which is inwardly bent as at @l and terminates in a cylindrical section t2. It will be seen that the housing member just de scribed forms one wall of an inlet passage, an air and liquid guiding shoulder, a sump and tubular member, and a part of a silencer or resonator chamber.

VAiixed in the ytubular conduit "14. .Xed to thebridge 8.0.and is threaded at its upper A second housingcmember 631s securedinV part to the shoulder andisprovidedwith an'inwardly bent, .downwardly dependingmember 54. This member lies'within the air inlet passage 54 and is spaced away from its walls.

A bottom plateSisprovided witha shoulder 66 which is gripped byaportion .E1 formed. adjacent the bottom of .the member'v 63. Centrally,

the portion isprov-ided with a cylindrical part 58 which is secured toIa-tubular-.conduit .E9 which is provided with a rshoulder lubeneath whiehis positioned a gasket 1|. A tubular portion 12 vis secured tothe member 65 bythe flangelSfand embraces 'the 'gasket 1 l 'A cylindrical member y:1li is positioned within the cleaner'rand'issecure'd asiat 15'to thetportion 62 of the member' Gl. .It is-provided with `one or more perforations 16.` 'Afpartition member 11 divides the total. resonator or silencer .space into two chambers. At'its outer [edgeitis provided with af flange `18wh`ichfis secured tothe member 60. At its inner edge' itis provided with a ange 19 securedv tothe tubular `conduit 1t.

A bridge member `extends across 'and is A stud 'Si 'is end as at -82-to receive a thumb. nut 83.

'A lter mass-*Mis` positioned within a shell 85' which" is cut away alongy its bottom and` shaped to provide spokes or arms 86 which support a screen 81 upon which the lter material rests. Integral with the shell 85 and the members 85 is a ring-like portion 88 which is secured to a generally cylindrical member 89 which forms the inner wall of the lter mass structure. The member 89 is inwardly bent as at 9B' and terminates in a ange 9|. The member B9 may be made integral with or secured to a bafe 92 which is provided with a peripheral skirt 93 and a plurality of louvers 94 in which downwardly bent portions S5 are positioned. A screen 9E is positioned upon the top of the lter mass 84. A

cover plate 91 overlies the cleaner and a substantial part of the silencer chamber, and it is downwardly and inwardly bent at its periphery, as at 98, to engage the outwardly bent edge of the shell 85 and to grip it and the screen 95. A member 99 is positioned beneath and partly in contact with the cover 91 and is provided with a downwardly depending peripheral iiange mi) and an outwardly extending peripheral portion IUI beneath which the edge of the screen 95 is positioned. A plurality of slots, perforations or other openings |02 is formed in the member itil.

i Sound insulation |03 is fixed beneath the member 99 and is in part held in place by a fastening member |04 which is gripped by the inwardly turned edge |05 of the cover plate 91 which also grips the edge of the member 99.

Although I have shown an operative form of my invention, it Will be recognized that many changes in the form, shape and arrangement of parts can be made without departing from the spirit of the invention, and my showing is, therefore, to be taken as, in a sense, diagrammatic.

The use and operation of this invention are as follows:

In general the device as shown is intended as an air cleaner for internal combustion engines. It is put in communication with the carburetor or other device where the air is required in the operation of the engine. Oil is put into the cleaner sump, and normally when static it lies approximately on the level of the line which defines the upper portion of the shoulder; that is to say, at the line Y of the figure. When the engine to which the device is secured is operated, air moves through the cleaner entering the annular inlet passage, moving downwardly across the shoulder dened by the housing or casing member in which the sump is formed. The air moves upwardly through the filter mass, and oil or other liquid is carried from the sump into the filter mass. The air, after being cleaned in the filter mass, moves inwardly and downwardly through the outlet passage into the carburetor or engine.

Insofar as the cleaning proper is to be considered, the cleaner of this invention is relatively conventional. It is in the arrangement of the silencer chambers that the novelty resides.

It is now well known that noises from engines and elsewhere tend to travel outwardly from the engine through the carburetor, or other path of escape, and through the air cleaner. To prevent this escape of sound, the air cleaner is provided with silencing chambers so positioned and arranged that they silence, reduce or completely eliminate the noises which would otherwise espe to and beyond the cleaner.

In the form of the figure a substantial part of the silencing means is located within the inner margin of the filter mass and above the bottom of the cleaner proper. However, an appreciable part of the total silencing chamber is below the bottom of the cleaner and outside the outer margin of the filter mass.

I claim:

1. In combination in an oil bath air cleaner, casing means defining a liquid sump space, casing means defining an annular filter mass positioned above said sump space, said casing means defining an air inlet to said sump space, outlet conduit defining means positioned to discharge cleaned air from said cleaner, a filter mass shaped to dene a cavity within itself, and a silencer positioned in part within the projected area of said filter mass, a substantial portion of said silencer extending into the cavity within said filter mass, and a portion of said silencer surrounding said filter mass, and a portion of said silencer lying below said sump space.

2. In combination in an oil bath air cleaner, casing means defining a liquid sump space, casing means defining an annular filter mass positioned above said sump space, said casing means defining an air inlet to said sump space, outlet conduit defining means positioned to discharge cleaned air from said cleaner, a filter mass shaped to define a cavity within itself, and a silencer positioned in part within the projected area of said filter mass, a substantial portion of said silencer extending into the cavity within said filter mass and lying above the bottom and below the top of said filter mass, and a portion of said silencer surrounding said filter mass, and a portion of said silencer lying below said sump space.

3. In combination in an oil bath air cleaner, casing means defining a liquid sump space, c'asing means defining an annular filter mass positioned above said sump space, said two casing means defining together an annular air inlet to said sump space outlet, conduit means positioned to discharge cleaned air from said cleaner, a filter mass shaped to define a cavity within itself and a silencer positioned in part within said cavity and in part outside of both said casing means, and in part beneath said filter mass, said Vliquid sump space and both said casing means.

Name Date Baillio Oct. 15, 1940 Number 

